Schuster Heating & Pump Co., Inc., of Peosta, Iowa, and Architectural Consulting Engineers of Oak Park are the 2018 GAOI Top Job winners. Doug Schuster, left, and Mark Nussbaum, right, were recognized by GAOI President Chad Mayes during the IL Geothermal Conference in mid-March in Bloomington. Schuster submitted the winning residential Top Job entry for a northwestern Illinois geothermal residential project. Nussbaum had the winning commercial entry for the Unity Temple geothermal retrofit project at the historic Oak Park Unity Temple, which was originally designed by Frank Lloyd Wright.